更新1:
what about 10 m x 6 m but weight the same 1 kg ?
what about 10 m x 6 m but weight the same 1 kg ?
收錄日期: 2021-04-21 18:14:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160424093946AAIEvWd